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129 results about "Adaptive loop filtering" patented technology
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Video encoding / decoding method and bitstream generation method
Provided are a video encoding method, a video decoding method, and a bitstream generating method using an identifier indicating whether a corresponding chroma component is filtered by an adaptive loop filter (ALF).SOLUTION: The video encoding method includes encoding an image to generate a bitstream. In the bitstream, a first syntax element is configured to indicate whether the first chromaticity component is filtered with an adaptive loop filter (ALF), and a second syntax element is configured to indicate whether the second chromaticity component is filtered with the ALF.SELECTED DRAWING: Figure 5
Owner:SZ DJI TECH CO LTD
Method and device for video coding using CC-ALF based on nonlinear cross-component relationships
A method and an apparatus are disclosed for video coding CC-ALF based on a nonlinear cross-component relation. A video decoding device obtains a reconstructed frame that is an output of a sample adaptive offset (SAO) filter and generates an adaptive loop filter output (ALF output) by inputting the reconstructed frame into an adaptive loop filter (ALF). The ALF output includes a luma ALF output and a chroma ALF output. The video decoding device generates corrected values of a chroma component by inputting the luma ALF output into a nonlinear cross-component ALF (nonlinear CC-ALF) and generates an enhanced chroma ALF output by summing the corrected values of the chroma component and the chroma ALF output.
Owner:HYUNDAI MOTOR CO LTD +2
Conditional filter shape switch for adaptive loop filter in video coding
A mechanism for processing video data is disclosed. The mechanism includes determining to use at least one extended tap in an adaptive loop filter (ALF). A conversion can then be performed between a visual media data and a bitstream based on the ALF. The ALF may also employ a conditional filter shape switch.
Owner:BYTEDANCE INC +1
Method of using adaptive loop filter and system thereof
PendingCN122027807ADigital video signal modificationControl theoryElectrical and Electronics engineering
The invention provides a video data processing method. The method comprises the following steps: receiving a bit stream; decoding the bit stream to obtain a first index; determining a maximum number of adaptive loop filters (ALFs) of components of the picture based on the first index; and processing the pixels in the picture by utilizing the ALF.
Owner:ALIBABA GROUP HOLDING LTD
Filter shape switch for adaptive loop filter in video coding
PendingEP4520041A4Digital video signal modificationVideo encodingElectrical and Electronics engineering
A mechanism for processing video data is disclosed. A filter is applied to a video unit. The filter employs an extended tap for a first sample in the video unit and a spatial tap for a second sample in the video unit. A conversion is performed between a visual media data and a bitstream based on the video unit.
Owner:DOUYIN VISION CO LTD +1
Method and Apparatus for Adaptive Loop Filter with Chroma Classifiers by Transpose Indexes for Video Coding
PendingUS20260095570A1Digital video signal modificationPattern recognitionComputer graphics (images)
A method and apparatus of ALF classification and / or geometric transformation for the chroma component. According to the method, reconstructed pixels are received, where the reconstructed pixels comprise a current colour block and the current colour block comprises a current luma block and a current chroma block. A transpose index for the current chroma block is determined. A filtered chroma output is derived by applying a target chroma ALF to the current chroma block, where the transpose index is included in information used for selecting the target chroma ALF from a set of chroma ALFs, or the transpose index is used to select a target geometric transformation for generating the target chroma ALF, or both. Filtered-reconstructed pixels are provided, where the filtered-reconstructed pixels comprise the filtered chroma output.
Owner:MEDIATEK INC
Method and Apparatus of Adaptive Loop Filter Selection for Positional Taps in Video Coding
Owner:MEDIATEK INC
Chroma ALF method and apparatus with residual taps in video coding systems
A method and apparatus for performing a chroma adaptive loop filter (ALF) and / or a cross-component adaptive loop filter (CCALF) using a luma residual input are disclosed, in particular, a method and apparatus for performing a chroma adaptive loop filter (ALF) and / or a cross-component adaptive loop filter (CCALF) using a luma residual input. According to this method, reconstruction data relating to the current block, including a luma block and one or more chroma blocks, is received. A chroma ALF, a CCALF, or both is determined, wherein the chroma ALF, the CCALF, or both includes at least one first filter tap associated with a luma residual sample, at least one second filter tap associated with a chroma residual sample, or both. One or more filtered chroma samples are derived by applying the chroma ALF, the CCALF, or both to the luma block, the one or more chroma blocks, or both. The one or more filtered chroma samples are provided.
Owner:MEDIATEK INC
Adaptive loop filter with virtual boundaries and multiple sample sources
A method for implementing an adaptive loop filter (ALF) in a video system is provided. A video coder receives data for a block of pixels to be encoded or decoded as a current block of a current picture of a video. The video coder receives a current sample of the current block. The video coder applies a filter to the current sample to generate a correction value. Neighboring samples from two or more different sources are used as inputs to the filter. When a first neighboring sample is within a virtual boundary, the first neighboring sample is used as an input to the filter. When the first neighboring sample is beyond the virtual boundary, the first neighboring sample is precluded as an input to the filter. The video coder adds the correction value to the current sample as a filtered sample of the current block.
Owner:MEDIATEK INC
Method for using adaptive loop filter and system therefor
ActiveCN116601960BDigital video signal modificationControl theoryElectrical and Electronics engineering
The present disclosure provides a method for processing video data. The method includes receiving a bitstream, decoding a first index from the bitstream, determining a maximum number of adaptive loop filters (ALFs) for a component of a picture based on the first index, and processing pixels in the picture using the ALFs.
Owner:ALIBABA GROUP HOLDING LTD
Adaptive video filter
A video coder may receive video data and apply a filter to a plurality of types of samples of the video data. The plurality of types of samples may include two or more of: an input of a fixed filter, an output of a fixed filter, an input of a signaled filter, an output of a signaled filter, an input of an adaptive loop filter, an output of an adaptive loop filter, an input of a sample adaptive offset (SAO) filter, the method comprises the following steps: receiving the input of an SAO filter, the output of an SAO filter, the input of a bilateral filter, the output of the bilateral filter, the input of a cross component SAO filter, the output of the cross component SAO filter, the input of a deblocking filter, the output of the deblocking filter, filtered reconstructed residual data, a dequantization coefficient, a filtered dequantization coefficient, a predictor or a filtered predictor.
Owner:QUALCOMM INC
Video decoding method and apparatus, and video encoding method and apparatus
A video decoding method including reconstructing a current block comprising a current pixel via a prediction and an inverse transformation. The method including obtaining, from a bitstream, information indicating whether an in-loop filtering by using at least one pixel located outside a boundary of a current slice is applicable. The method including padding a value of the first adjacent pixel as a value of a second adjacent pixel. The method including determining filter coefficients corresponding to locations of third adjacent pixels used for an adaptive loop filter (ALF) of the current pixel based on a value of the current pixel and values of the third adjacent pixels. The method including obtaining a value of a filtered current pixel by adding the value of the current pixel.
Owner:SAMSUNG ELECTRONICS CO LTD
Method for using adaptive loop filter and system therefor
PendingCN122179591ADigital video signal modificationControl theoryElectrical and Electronics engineering
The present disclosure provides a method for processing video data. The method includes receiving a bitstream, decoding a first index from the bitstream, determining a maximum number of adaptive loop filters (ALFs) for a component of a picture based on the first index, and processing pixels in the picture using the ALFs.
Owner:ALIBABA GROUP HOLDING LTD
Unified classification method and device in loop filtering
The invention discloses a loop filtering method and device for reconstructing a video. The method receives input data of a current block, wherein the input data includes reconstructed samples of the current block. At least two loop filters are applied to a current block, where the at least two loop filters belong to a loop filter bank comprising a bilateral filter (BIF) and an adaptive loop filter (ALF), and the classification processes of the at least two loop filters share one input source, one or more classification rules, one or more processing units or a combination thereof. A filtered output generated by applying the at least two loop filters to the current block is provided.
Owner:MEDIATEK INC
Adaptive loop filter scaling factors for video coding
Owner:QUALCOMM INC +5
An apparatus, a method and a computer program for video coding and decoding
PCT designated stageWO2026083147A1Digital video signal modificationPattern recognitionComputer graphics (images)
A method comprising: receiving one or more image block units of a picture, the image block units comprising samples in color channels comprising at least one chrominance channel and one luminance channel; reconstructing samples of said colors channels to produce reconstructed chrominance samples and reconstructed luminance samples; deriving an indication that picture-level cross-component model inheritance is used for adaptive in-loop filter chrominance update for the current picture; determining a reference picture from a set of candidate reference pictures; and applying, for said one or more image block units of the picture, the adaptive in-loop filter chrominance update parameters as used in co-located image block units of the reference picture.
Owner:NOKIA TECHNOLOGIES OY
Video or image encoding method and apparatus therefor
The disclosure relates to a video or image encoding method and an apparatus thereof. According to the disclosure of the document, an image decoding method performed by a decoding device includes the steps of: obtaining image information including prediction mode information and residual information through a bitstream; deriving a prediction mode of a current block based on the prediction mode information; deriving a prediction sample based on the prediction mode; deriving a residual sample based on the residual information; generating a reconstructed sample based on the prediction sample and the residual sample; deriving a filter coefficient of an adaptive loop filter (ALF) process for the reconstructed sample; and generating a modified reconstructed sample based on the reconstructed sample and the filter coefficient, wherein the image information includes a first adaptation parameter set (APS), the first APS includes an ALF data field, and the ALF data field includes an ALF parameter used to derive the filter coefficient.
Owner:NOKIA TECHNOLOGIES OY
Multi-parameter adaptive loop filtering in video processing
Apparatus, systems, and methods for video processing are described. In one exemplary aspect, a method for video processing includes: performing a conversion between a bitstream of video comprising one or more video regions and video, wherein a limiting parameter for filtering a reconstruction of a first video unit of the video region using a nonlinear adaptive loop filter is derived based on first side information included in the bitstream and an identifier of a first adaptive parameter set, and wherein filter coefficients for filtering the reconstruction of the first video unit using the nonlinear adaptive loop filter are derived based on second side information included in the bitstream and an identifier of the first adaptive parameter set.
Owner:DOUYIN VISION CO LTD +1
Preprocessing of input data for adaptive loop filter in video coding
A device for decoding video data can be configured to determine a prediction block for a current block of the video data; determine a residual block for the current block of the video data; process residual data of the residual block to determine processed residual data; store the processed residual data; add the prediction block to the residual block to determine a reconstructed block; and perform adaptive loop filtering (ALF) on the reconstructed block, based on the processed residual data.
Owner:QUALCOMM INC
Cross component model for loop-filters in video coding
A mechanism for processing video data is disclosed. The mechanism includes determining to apply offset scaling in an adaptive loop filter (ALF) when parameters are reused from an adaptation parameter set (APS) in a bitstream. A conversion is performed between a visual media data and the bitstream based on the ALF.
Owner:DOUYIN VISION CO LTD +1
Adaptive loop filter joint optimization for video coding
PCT designated stageWO2026080199A1Digital video signal modificationComputer graphics (images)Algorithm
Owner:QUALCOMM INC
Methods and apparatus for adaptive loop filters and cross-component adaptive loop filters
A method and apparatus for video decoding / encoding are provided. In the provided method, the decoder can obtain an adaptive loop filter (ALF) classifier for sub-blocks, determine the ALF based on the ALF classifier, and obtain filtered chroma samples based on the ALF and reconstructed samples of chroma samples in the sub-blocks.
Owner:BEIJING DAJIA INTERNET INFORMATION TECH CO LTD
Method and apparatus of adaptive loop filter with prediction TAPS from reference pictures in video coding
A method and apparatus for in-loop filtering of reconstructed video are disclosed. According to the method, input data for a current blockis received, wherein the input data comprises reconstructed samples of the current block. An ALF (Adaptive Loop Filter) for a current sample in the current block is determined, wherein the ALF comprises one or more filter taps associated with one or more reference samples of the current sample. The ALF is applied to the current sample to generate a filtered output sample. Filtered output comprising the filtered output sample is provided.
Owner:MEDIATEK INC
Adaptive loop filter scaling factors for video coding
An apparatus configured to code video data may reconstruct a block of video data, determine a filter class for samples of the block, determine one or more filter sub-classes for samples in each filter class, and apply a filter to the samples in each filter sub-class, including applying a respective scaling factor to samples in each filter sub-class. The filter is an adaptive loop filter (ALF), a deblocking filter, a sample adaptive offset filter, a bilateral filter, a cross-component sample adaptive offset filter (CC-SAO), a cross-component adaptive loop filter (CC-ALF), or a neural network-based filter.
Owner:QUALCOMM INC +5
Adaptive loop filter residuals scaling with optimal initialization
2024P00814WO 23 ABSTRACT Systems, methods, and / or instrumentalities are disclosed herein for a device that may be related to adaptive loop filter residual scaling with optimal initialization. In examples, a device may include a processor. The device may determine a correction of a reconstructed picture sample. The device may determine a classification associated with the reconstructed picture sample. The device may, based on the classification, 5 determine a first scaling parameter. The device may determine a second scaling parameter based on the first scaling parameter. The device may generate a scaled correction based on the second scaling parameter and the correction. The device may apply the scaled correction to the reconstructed picture sample.
Owner:INTERDIGITAL CE PATENT HOLDINGS SAS
Temporal prediction of parameters in nonlinear adaptive loop filters
To provide a device, a system, and a method for temporal prediction in nonlinear adaptive loop filtering.SOLUTION: A parameter temporal prediction method in nonlinear adaptive loop filtering includes configuring, for a current video block, one or more parameters of a clipping operation that is part of a nonlinear filtering operation, and converting between the current video block and a bitstream representation of the current video block on the basis of the one or more parameters, and one or more parameters are encoded according to a rule.SELECTED DRAWING: Figure 8A
Owner:DOUYIN VISION CO LTD +1
Cross-component adaptive loop filter for chroma
A method of filtering an image is disclosed, the method comprising: receiving filter coefficients and first component sample values corresponding to samples surrounding a reference sample, and inputting said filter coefficients and first component sample values into a cross component filter to produce a cross component filter output; wherein said cross-component filter uses a restricted number of bits to represent said filter coefficients and / or first component sample values to produce said filter output.
Owner:CANON KK
Encoder, a decoder and corresponding methods for adaptive loop filter adaptation parameter set signaling
The present disclosure provides a method of decoding a coded video bitstream, the method comprising: obtaining a picture-level syntax element included in a picture header of the current picture by parsing the video bitstream, wherein the picture-level syntax element is used to specify whether an adaptive loop filter (ALF) is enabled for the current picture; in case that the picture-level syntax element specifies the adaptive loop filter is enabled for the current picture, obtaining a parameter set identifier included in the picture header, wherein the parameter set identifier is used to indicate a first parameter set comprising a set of ALF parameters, and wherein a temporal identifier of the first parameter set is less than or equal to a temporal identifier of the current picture; performing the adaptive loop filter on at least one slice of the current picture based on the first parameter set.
Owner:HUAWEI TECH CO LTD
Method and Apparatus of ALF with Model-Based Taps in Video Coding System
PendingUS20260019573A1Digital video signal modificationPattern recognitionComputer graphics (images)
Method and apparatus to generate cross-component model-based taps for ALF. According to this method, input data associated with a current block including a first-colour block and a second-colour block are received, where the first-colour block includes first-colour samples and the second-colour block includes second-colour samples. One or more target second-colour samples are derived according to a Cross-Component Model (CCM) applied to one or more CCM-input first-colour samples or deriving said one or more target second-colour samples at one or more non-integer positions by applying one or more interpolation filters to one or more interpolation-input first-colour or second-colour samples. One or more filtered second-colour samples are generated by applying target ALF (Adaptive Loop Filter) using filter input samples comprising one or more filter-input second-colour samples and said one or more target second-colour samples.
Owner:MEDIATEK INC
Video stream processing method, electronic device, storage medium and program product
The embodiment of the invention relates to the technical field of video coding and decoding, and provides a video stream processing method, an electronic device, a storage medium and a program product, and the method comprises the steps: determining an APS subset used by a coding tree unit in a video image for adaptive loop filtering, writing filtering parameter information in a coded video stream according to the APS subset, the filtering parameter information includes signaling for determining whether the coding tree unit uses a default subset of APS indicated by the high-level signaling. According to the embodiment of the invention, whether each CTU uses the default APS subset or not is indicated through the signaling, and the default APS subset indication information is carried through the high-level signaling, so that repeated writing of the default APS subset indication information in a plurality of CTUs can be reduced, redundant information in a video coding stream is reduced, and the coding or decoding efficiency is improved.
Owner:ZTE CORP